I wondered about latex paint too when I was about ready to finish my KR. I made up a sheet of glass and resin and finished it to the same point as my wings and fuselage. I bought the best "gloss" latex and applied it. It apparently has some latex (hence the name) and a filler of clay. No matter what I did, it ended up gumming up the sandpaper and would roll up a mess when I tried to buff it.
To make a long story short, spend the extra couple of hundred dollars for real paint. It will have a much harder surface with minimal filler--other than the pigment--and can be buffed to a high gloss. You won't be sorry because it will finish up the hundreds of hours you already have invested. I suggest that you try it yourself. Then go to the nearest automotive paint dealership and get the good stuff. Jim Vance Claflin, KS va...@hbcomm.net